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Hello everybody, our campus network is completely based on Cisco technology, access switches are mostly c2960x-48ts, firmwarec2960x-universalk9-mz.152-4.E7.bin. Small number of computers (10-20 out of more than 1000) generates lots of LINEPROTO-5-UPD...
We run two C9800-L-F in HA pair, IOS XE 17.9.4. I confirm the exact same issue (core 7 permanently 100% on both controllers), red High CPU Utilization alert on GUI dashboard.
ASDM on Linux is broken for some time. I found a temporary solution, if you have acces to a Mac machine:Download and install MacOS version of the ASDM laucher on a Mac machine, then copy all *.jar and *.PEM files (!) to a folder at your Linux machine...
We eventually realized that our problems are related to the (still unresolved) Cisco bug CSCus35889: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCus35889/ Disabling power efficient-ethernet solved our problem.
